Winding machine



Dec. 12, 1944. w. SIEGENTHALER WINDING MACHINE Filed DeO. l 1942 Patented Dec. 12, 1944 WINDING MACHINE Walter Siegenthaler, Erlenbach, Switzerland,

assignor to Maschinenfabrik Schrer, Erlenbach, Zurich, Switzerland Application December 1, 1942, Serial No. 467,495 In Switzerland December 1, 1941 1 Claim.

This invention relates to a winding machine in which a thread guide is reciprocated by a rotatable cam member for the purpose o f producing crosswinds.

According to the present invention the cam member is actuated by a driving wheel the speed of revolution of which varies from that of an auxiliary wheel arranged laterally thereof so that, due to lateral cooperation of the two wheels, the driving wheel is caused to be shifted axially back and forth in consequence of which the traverse of the thread guide is accordingly varied.

By this means the ends of the thread ackage are provided with a taper, in a manner known per se, for the purpose of securing the package ends and facilitating the operation of unwinding the thread from the spool. The means for obtaining this result as provided according to the present invention are of simple construction, require but little space and are reliable in operation and can be manufactured at small expense. Due to the small requirement on space of the pair of wheels provided for, these wheels can be accommodated in the usual gear box without any further provisions.

The invention is illustrated as embodied in a crosswinder by way of example only, in the accompanying drawing, in which however only the parts are shown that are necessary for properly explaining the invention.

In the drawing Fig. 1 shows an elevation partly in section;

Fig. 2 is a larger scale axial section of the winding spindle, and

Fig. 3 represents an axial section of the spool on a still larger scale.

On a spindle 2 provided with a friction, .that is, a driving disc I, a traversing disc 3 is rotatably mounted within the gear box 4. Into the circumferential guide groove of the traversing disc 3 projects a driving member 5 which is connected to a` bar 1 by means of a pin E. This bar is arranged in a carrier tube 8 and the connecting pin 6 protrudes through a longitudinal slot 9 formed in the carrier tube 8. A thread guide I2 in the form of a fork I3 for the reception of the winding thread is connected with the bar 'I by means of a stud I0 protruding through a longitudinal slot in the carrier tube 8.

In the operation of the machine the bar 'I is shifted axially back and forth in the tube 8 by the traversing disc 3 While the thread guide I2 operates to build up the winding thread into crosswinds on a relatively large spool I4. This spool is of the type of a flanged spool which is mounted, by means of two supports I5, I6, on the spindle 2 which thus constitutes the winding spindle. On removal of the support I6 from thewinding spindle 2 which is axially non-displaceably mounted on the gear box 4 the spools can be doffed each time when they are to be exchanged for a fresh spool required to be wound.

The winding spindle 2 vis provided with a toothed portion Il by means of which the rota- Vtionalmovement of the winding spindle is transmitted to a gear IB and to the mounting shaft I9 of the latter. The shaft I9, which is mounted on the gear box 4, is in driving engagement with a gear composed of two toothed discs 2| and 22. The individual gears 2| and 22 are provided with laterally projecting rims 23 and 24 respectively which confront each other and mutually enter into bearing engagement by oblique faces. These oblique faces on the two wheel rims 23, 24 incline at corresponding angles of Obliquity, as evident from the drawing. The gear 2| is secured to a hollow shaft 25 pusheduon the winding spindle 2, whereas kthe gear 22 is xed to the hub of the traversing disc 3 which is mounted on the hollow shaft 25. On the hub of the traversing disc 3 a coil spring 26 surrounding the hollow shaft 25 "acts in the axial direction, for which purpose this spring abuts against a collar 2`| which in turn is backed by a screw hut 28 secured to the hollow shaft 25. The coil spring 26 functions to continually maintain the bearing engagement between the rim 24 of the gear 22- providing the driving wheel of the traversing disc 3, and the rim 23 of the gear 2| serving as an auxiliary wheel.

In the operation of the machine the two gears 2|, 22 are driven by the toothed portion 2O on the shaft I9. The number of teeth on the auxiliary gear 2|, which is vshown to be situated on the right hand side, exceeds that of the teeth on the left hand driving gear 22 by one, whereby the latter leads on the auxiliary gear 2|. However, this lead amounts only to a small angular range per revolution since the number of teeth entering into the question approximates, for example, sixty. In consequence of this permanently lasting leading of the driving gear 22 on the auxiliary gear 2| the driving gear 22 is axially displaced by iniiuence of the rims 23, 24, which cooperate with each other by means of their oblique faces, with the result that the traversing disc 3 is accordingly axially displaced.

Starting from the relative disposition of the two gears 2|, 22, as assumed in the drawing, in which the oblique faces of their rims 23, 24 bear snugly against each other, the driving' gear 22 is axially shifted to the left until the thickest portions of the rims 23, 24 overlie one another, whereupon the driving gear 22 begins to shift axially in the opposite direction until the thickest portion of the rim 24 overlies the thinnest portion of the rim 23 again, Vas shown. Thus the driving gear 22,"in rotating, performs-a relatively .slow axial reciprocating movement, the throw of which is determined by the angle of inclination of the. oblique faces on the rims 23, 24. This axial recipr-ocation performed by the traversing ineinber 3 results in altering the ltraverse of the thread guide I2 more or less `with respect "to 'the traversing movement eiected 'b'y means o'f 'the .l

guide groove of the traversing disc 3, whereby the thread package 29 in progress of lformation is provided with tapering ends 30, 3| {Pig-3).

The inclination of the oblique or cam faces provided on the rims 23, 24 of the gears 2 l, 22 can obviously be varied as required dependent upon the amount of alterationof traverse `to be im- 'parted to the thread guide II in the sense of decreasing or -increasing said traverse as determined by the traversing discitself. The form of the said cam faces 'can lalso Abe `varied. Instead of providing for the driving wheel 22 to lead on the auxiliary wheel'Zl the latter can be caused to lead on the -former l'by vaccordingly choosing the number of teeth for said wheels I claim:

In a winding machine, a gear box having walls constituting a mounting frame, a spindle rotatably mounted in the walls of said box and extending beyond said box at both ends, frictional drive means on one end of said spindle, spool mounting means on the other end of said spindle, a traversing disc, means mounting :said disc on said spindle within said box, said disc being rotat- `able and axially slidable relative to said spindle,

a reciprocable thread guide bar mounted in the walls of said box and extending adjacent the winding spool and operable by the traversing disc, a-toothed auxiliary wheel located' laterally ofthe spindle,'1neans for driving said auxiliary wheel from said spindle, a pair of toothed wheels, and 'means rotatably mounting said wheels on Asaid 'spindle to mesh with said auxiliary wheel, saidgears having different numbers of teeth from each other, one of said gears being fixedly connected with the :traversing disc so as to'drivesaid disc, said `gears 'having adjacent engaging cam sur-faces whereby in operation the relative turning movement of the gears moves the traversing ldisc axially under the influence of the Scamsurfaces to alter the movement of the thread guide.

WALTER SIEGENTHALER. 

